Earthquake could cause California to instantly sink

Earthquake could cause California to instantly sink
Cal State Fullerton professor Matt Kirby and graduate student Robert Leeper, Source: Fullterton

A new USGS/Cal State Fullerton study shows that California could instantaneously sink and be absorbed by the sea

(WASHINGTON, DC) Land within major California seismic faults could sink by between 1.5 and 3 feet in a matter of seconds, causing catastrophic devastation, says a new study. It also shows that the Newport-Inglewood fault is more active than previously thought.

“It’s not just a gradual sinking. This is boom — it would drop. It’s very rapid sinking,” Robert Leeper, lead author of a new study published in Nature, carried out with the help of the US Geological Survey, told the LA Times.

Leeper’s team took 55 samples at the Seal Beach National Wildlife Refuge in southern Los Angeles, by submerging 20-feet pipes that collected samples of the sediment, initially looking for evidence for a prehistoric tsunami.

Instead, the team from Cal State Fullerton found an identical pattern, of living vegetation suddenly dropping and being buried underneath the ground.

“We identified three of these buried layers composed of vegetation or sediment that used to be at the surface,” said Leeper. “These buried, organic-rich layers are evidence of three earthquakes on the Newport-Inglewood in the past 2,000 years.”

The earthquakes likely occurred around 50 BC, 200 AD and finally in 1450 AD.

Cal State Fullerton professor Matt Kirby, who worked with the Leeper on the study, said the sinking would occur quickly and likely result in part of California being covered by the sea.

"It's something that would happen relatively instantaneously," Prof Kirby said. "Probably today if it happened, you would see seawater rushing in."

The scientists drew two conclusions: a 6.4 Richter scale earthquake in 1933 did not cause the same sinking, suggesting that the older tremblors on the fault, which stretches between LA and San Diego, were probably between 6.8 and 7.5. Leeper said that this means that a major earthquake could happen on the Newport-Inglewood once every 700 years, not 2,300 years as had been previously assumed.

Secondly, the shape of the depression studied by Leeper is repeated in other faults in the state, and a serious earthquake at any of them could cause the same sinking effect.

While the authors suggested that further study is needed of other depressions, Kate Scharer, a USGS research geologist, told the LA Times that if a rapid tremblor-triggered sinking would occur, the effects could be catastrophic, demolishing pipes, lines, roads and other infrastructure not designed for such ground level fluctuations.

RT copy, TRUNEWS contribution 

Please contact TRUNEWS correspondent Edward Szall with any news tips related to this story.
Email: | Twitter: @realEdwardSzall 
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